Oldboy is a 2003 South Korean mystery thriller film directed by Park Chan-wook. It is based loosely on the Japanese manga of the same name written by Nobuaki Minegishi and Garon Tsuchiya. The film won the Grand Prix at the 2004 Cannes Film Festival and high praise from the President of the Jury, director Quentin Tarantino. Critically, the film has been well received in the United States, with an 81% "Certified Fresh" rating at Rotten Tomatoes.